ObjectiveResource is an Objective-C port of Ruby on Rails' ActiveResource. It provides a way to serialize objects to and from Rails' standard RESTful web-services (via XML or JSON) and handles much of the complexity involved with invoking web-services of any language from the iPhone. This talk shows you how easy it is to create a 2-way communication channel between a very basic Rails application and an iPhone app.

1. iP[od|hone|ad] & the tubes
Paul Ardeleanu

2. Why?
75m devices to date (iPhone + iPod touch)
140k iPhone apps available
3bn downloads in 18 months
Average user spends $8/month
There will be a second gold rush
Your MD will love it

3. No really, why?
Objects are everywhere (NSObject)
MVC framework
Extremely consistent API
Extremely good documentation
Easy to pick up

4. Challenges
Methods syntax
Selectors
Memory management (no garbage collection)
Autorelease
Delegates

5. Exchange data
NSURLRequest XML
NSURLConnection JSON
NSString *url = [NSString stringWithFormat:@"%@%@", @"https://websi.te/contacts.xml", self.path];
NSMutableURLRequest *theRequest=[NSMutableURLRequest requestWithURL:[NSURL URLWithString:url]
cachePolicy:NSURLRequestUseProtocolCachePolicy
timeoutInterval:10.0];
NSURLConnection *theConnection=[[NSURLConnection alloc] initWithRequest:theRequest delegate:self];
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error

6. Objective Resource
iphoneonrails.com
Objective-C port of Ruby on Rails' ActiveResource

7. Demo

8. Configuration
//Set the address of the rails site. The trailing slash is required
[ObjectiveResourceConfig setSite:@"http://localhost:3000/"];
//Set the username and password to be used for the remote site
[ObjectiveResourceConfig setUser:@"remoteResourceUserName"];
[ObjectiveResourceConfig setPassword:@"remoteResourcePassword"];
[ObjectiveResourceConfig setResponseType:XmlResponse];

9. Model
@interface Conference : NSObject {
NSString *conferenceId;
NSString *name;
NSString *location;
NSString *startDate;
}
@property (nonatomic , copy) NSString *conferenceId;
@property (nonatomic , copy) NSString *name;
@property (nonatomic , copy) NSString *location;
@property (nonatomic , copy) NSString *startDate;
@end

10. Model
@implementation Conference
@synthesize conferenceId;
@synthesize name;
@synthesize location;
@synthesize startDate;
- (void)dealloc {
[conferenceId release];
[name release];
[location release];
[startDate release];
[super dealloc];
}
@end

11. Remote methods
[Conference findAllRemote];
Conference *conf = [[Conference alloc] init];
[conf saveRemote];
[conf findRemote:45];
[conf updateRemote];
[conf destroyRemote];

12. Thank you!
Paul Ardeleanu
hello24.com
twitter.com/hello24com
demo projects available for download at hello24.com